Gache components

Server

Protocol handling (FSMs)
- Application: Memcache protocol proper
- Presentation: ASCII / Binary
- Transport "connection":
- TCP with persistent connections
- TCP without persistent connections
- UDP
- raw socketpair (stdin/stdout)
- Event handling
Readline equivalence for ASCII presentation interactions
Storage
- Pluggable storage
- Journaling
- Storage engines
- Memory
- Memcached, for use as a debugging proxy in front of a standard instance
- Others ?
- Memory
  - Main memory allocation
  - Slab allocator
- Reporting
- Background expiration lurker

Event handling: builtin

From http://nginx.org/en/docs/events.html

Method	Linux	macOS	Windows	BSD	UNIX	Notes
select	X	X	X	X	X	Least efficient, widest support
poll	X	X		X	X	Low efficiency, wide support
kqueue		X, Go		X	Go	Efficient
epoll	Go					Efficient
/dev/poll					X	Efficient
eventport					Solaris 10+, Go	Problems, use /dev/poll instead
IOCP			X, Go			Recommended for Windows

UNIX: Solaris, HP-UX, IRIX, Tru64
Golang runtime uses epoll/kqueue/IOCP so no need for libevent or similar.
See https://golang.org/search?q=netpoll#Global

Readline

Emulated by https://github.com/chzyer/readline
"Video" on: https://asciinema.org/a/32oseof9mkilg7t7d4780qt4m
Demo source: https://github.com/chzyer/readline/blob/master/example/readline-demo/readline-demo.go

Client library